Extract restart read/write IO from `M2ulPhyS` #460

Job	Run time
Build/GPU (Cuda)	21m 20s
Build/GPU-CPU	14m 33s
Build/GPU (AMD/HIP)	6m 54s
cpuimage / docker env	8s
Build/CPU	58m 54s
Create dist tarball	3m 45s
Code style	1m 27s
CPU release tarball tests	56m 44s
GPU/Cuda release tarball tests	25m 41s
	3h 9m 26s

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